NewEditWindow
Data+errors

Data beolvas, kiír, main-be DataHandler, savedata, pár help, + error
trycatch classok
Merge pull request #11 from RockerM4NHUN/K

Data+errors
Merge pull request #12 from RockerM4NHUN/master

Update K
Edits
Merge remote-tracking branch 'origin/K'
Merge pull request #14 from RockerM4NHUN/D

Adding event based list and DataModel class
Merge pull request #15 from RockerM4NHUN/master

Merging